10~2400 Pair Telephone Cable 0.4~0.5mm Underground
This specification covers multipair cables used in the provision of
voice and data services and the interconnection of electrical
equipment and instruments, particularly in and around process
plants, where transducer generated signals are transmitted through
marshalled circuits to panels, controllers and associated devices.
– Application: Cable is mainly used to transmit audio, 150k Hz and
below, the analog signals and 2048kbit / s and below, the digital
signal. Under certain conditions, can also be used to transmit 2048
kbit / s or more digital signals.
– Installation: Duct / Aerial (non-self-supporting aerial)/Buried.
– Moisture barrier and polyethylene jacket enhances anti-jamming
and moisture proof performance.
– Fill oil enhanced cable moisture proof performance.
– Temperature range during operation (fixed state): -20°C ~ +70°C.
Electrical Characteristics (for reference )
|Capacitance unbalance, pF/km(0.8kHz or1 kHz)|
|Pair to Pair||Individual maximum value for 10 pairs||250||250||200||200||200||200|
|Maximum value for more than 10 pairs||250||250||200||200||200||200|
|Pair to ground||Maximum value for 10 and more than 10 pairs||2630|
|Maximum average value for more than 10 pairs||570||570||490||490||490||490|
|Voltage DC (for 3 seconds)|
|Pair to Pair (V)||2000|
|Pair to shield (V)||6000|
|Max. Value DC resistance of conductor, Ω/km (20°c)||148||95||65.8||48.0||36.6||28.5|
|Resistant unbalance||Maximum average value (%)||1.5||1.5||1.5||1.5||1.5||1.5|
|Maximum value (%)||5.0||5.0||5.0||4.0||4.0||4.0|
|Mutual Capacitance, nF/km (0.8 kHz or 1 kHz)|
|Maximum value||10 pairs||58.0|
|More than 10 pairs||57.0|
|Average value||10 pairs||52.0±4.0|
|More than 10 pairs||52.0±2.0|
|Equal Level Far-End Crosstalk,db/km (150 kHz)|
|Min. value of combination of pair to pair at random||58|
|Average power (Each combination of basic unit of thirty pairs)||≥69|
|Average power of the combination pairs in 12 and 13 pairs or 10 and
|Near-end Crosstalk loss, dB (1024kHz )|
|Length≥300m The lowest M-S Value of all the required||10 pairs-53; 12, 13 pairs-54; cable of 20 or 30 pairs or in the
basic unit-58; between adjacent 12, 13 pairs-63; adjacent 25
units-64; between two opposite basic units or sub-units in super
unit-70; between basic units or sub-units of different
|Minimum value of insulation resistant, MΩ·km(20°c)||10000 (DC voltage: 100~500v, 1 minute)|
|Inherence attenuation, dB/km (20°c, 150kHz/1024kHz)|
|More than 10||The average value no more than||12.1/27.3||9.0/22.5||7.2/18.5||6.1/15.7||5.7/13.7||4.9/11.5|
|10 pairs||The average value no more than||110% of maximum average of the same type more than 10 pairs|
|Variation of electrical characteristic|